In this April 19, 2005 file photo, black smoke billows from the chimney atop the Sistine Chapel at the Vatican, indicating that the cardinals gathered in the Conclave for the second consecutive day have not yet chosen the new pontiff. White smokesignals that cardinals have chosen a pope and he has accepted. The Vatican announced Monday, Feb. 11, 2013 that Pope Benedict XVI, who was elected pope in the 2005 conclave, is stepping down on Feb. 28, becoming the first pontiff in 600 years to resign. T